Last name Янкус (Iankus 
, Jankus 
, Янкус 
) , in the world, is quite a rare surname. The family name Янкус is characteristic of Lithuania, where it is quite a common surname, Hungary, where it is a rare surname, and Norway. Not in comparison with a country's population, it is commonest in Lithuania, the United States, and Germany. Very seldom, Янкус is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Iankus | Romania |
| Jankus | Australia, Germany, Hungary, Lithuania, United States |
| Янкус | Kazakhstan, Russia, Ukraine |
| Yankus | Australia, Colombia, New Zealand, Russia, United States |
| янкус, юозас юргисович Lithuanian artist (1912-1999), LT (b. 1912) |
|